MAINTAINERS: phy: Add Neil Armstrong as reviewers for phy subsystem

Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251201084652.422057-1-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: vinodkoul

MAINTAINERS

@@ -10439,6 +10439,7 @@ F:	include/uapi/asm-generic/
 
 GENERIC PHY FRAMEWORK
 M:	Vinod Koul <vkoul@kernel.org>
+R:	Neil Armstrong <neil.armstrong@linaro.org>
 L:	linux-phy@lists.infradead.org
 S:	Supported
 Q:	https://patchwork.kernel.org/project/linux-phy/list/